While they are playing together, Sam picks up his little brother Joe. Think about the force that acts on Joe.
a In which direction does this force act?
b What are the two objects that are interacting?
C Draw a diagram to show the force that acts on
Joe. Take care to label the force arrow correctly.

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?

Alarge box of mass m is pulled across a horizontal frictionless surface by a horizontal rope with tension t. a small box of mass m sits on top of the large box. the coefficients of static and

Two loudspeakers, 5.5 m apart and facing each other, play identical sounds of the same frequency. you stand halfway between them, where there is a maximum of sound intensity. moving from this point toward one of the speakers, you encounter a minimum of sound intensity when you have moved 0.33 m . assume the speed of sound is 340 m/s.part a) what is the frequency of the sound? part b) if the frequency is then increased while you remain 0.21 m from the center, what is the first frequency for which that location will be a maximum of sound intensity? express your answer to two significant figures and include the appropriate units.